40Plus_922mx
Posts: 1147
Joined: 4/17/2009
Location: High Desert, CA USA
FMF Fatty,
I am sticking this pipe on my 2 stroke resto, and noticed quite a bit of slack between the end of the pipe and where the silencer slides into place? Nothing in the packaging as far as a rubber sleeve (its been 12 years but i think i remember somethng like this?) to make that seal nice and tight? Thanks for your help.
Also did we used to run compression orings between the head and the pipe? I found nothing when I removed the old rusty bills pipe. And again nothing in the FMF packaging as far as new ones either? Thanks again... Just don't want my YZ to sound like a ratty 1991 kx is all.
40+
Torco1
Posts: 5156
Joined: 4/27/2007
Location: Corona, CA USA
I had an 04 YZ250 and I also worked at FMF years ago. If I remember, where the pipe and silencer meet up there should be a rubber piece that slides over the two to form a seal.....but that wasn't supplied by FMF, it was an OE Yamaha part. Also, where the pipe slides into the head, there should be two runner o-rings that fit into the two grooves that are on the outside of the pipe right where it slips into the head. Those I believe use to be supplied by FMF.
Torco1 wrote: I had an 04 YZ250 and I also worked at FMF years ago. If I remember, where the pipe and silencer meet up there should be a rubber piece that slides over the two to form a seal.....but that wasn't supplied by FMF, it was an OE Yamaha part. Also, where the pipe slides into the head, there should be two runner o-rings that fit into the two grooves that are on the outside of the pipe right where it slips into the head. Those I believe use to be supplied by FMF.
I just ordered an FMF gnarly pipe for my 2006 yz250 and there were two o-rings inside the exhaust where it joins with the exhaust port. And like torco said there should be a rubber seal with two circle springs that helps seal the pipe and silencer together.
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40Plus_922mx
Posts: 1147
Joined: 4/17/2009
Location: High Desert, CA USA
You guys are awesome thanks. I will get the rubber sleeve deal. I don't however remember seeing any grooves around the fat end of the pipe where it slides into the cylinder. Guess I better look again when I get home. Thanks again. Big help.
Arkmx
Posts: 673
Joined: 10/6/2006
Location: AR, USA
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O-rings on the inside of the pipe on the YZ.
Rubber sleeve from Yamaha = JOINT, EXHAUST # 3JE-14615-01-00
$28.65
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40Plus_922mx wrote: You guys are awesome thanks. I will get the rubber sleeve deal. I don't however remember seeing any grooves around the fat end of the pipe where it slides into the cylinder. Guess I better look again when I get home. Thanks again. Big help.
Wow that bike is gorgeous.
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TrailDigger
Posts: 112
Joined: 9/7/2012
Location: Winchendon, MA USA
Move that one a few feet to the right and let us see the one behind it with dem pro tapers.
If you're not mixing gas, you're not haulin ass.
Falcon
Posts: 503
Joined: 11/16/2011
Location: Fallbrook, CA USA
I have always tossed that rubber joint between the pipe and silencer into the trash. Run a bead of red silicone between the mating surfaces to get a better seal.
40Plus_922mx
Posts: 1147
Joined: 4/17/2009
Location: High Desert, CA USA
Here are some pics from yesterday. 95% done.
I do have a question again if that's cool? What do I run in the trans as far as oil?
Thanks again guys.
